Change your video's background music or add sound effects using the Add Audio to Video - Audio Video Mixer app. You can be creative and have fun mixing audio into your video files.

You can save the videos to your smartphone after you are done editing them. You can also share them on social media platforms, such as Tiktok, Facebook, Youtube, and more. 

There's also an option to speed up and slow down the videos you're gonna edit. It also supports different formats such as MP4, FLV, MKV, AVI, etc.

Add Audio to Video is the best app for adding audio to your videos! It's smooth, impressive, and totally free.